| ta4a SOUTH 88m COURT 


napp Sanitary Metal Window Trim 


PATENTED OCT. 185 1921 
ALL RIGHTS RESERVED 


FIRE PROOF - - - VERMIN PROOF 
EASY TO KEEP CLEAN... - INEXPENSIVE 


ushwit h 
ss 
nO place (or 
vermin 


AGiapp 
KNAPP BROTHERS aad MANUFACTURING CO. 


1343 So. 55th Court CHICAGO, ILL. 


S. REGISTERED 


This Catalogue and its Illustrations Copyright 1923 by Knapp Bros. Mfg. Co. 


Vo Architects, 2ngincens 
and Building Crattsmen 


Knapp Sanitary Metal Window Trim and Stools by this time require no introduction to the archi- 


tects, engineers or building craftsmen. Introduced three years ago, they were received with im- 


mediate approval, showing a long-felt want had been met and since then an ever-increasing demand 


has indicated their practical value. The experiences gained in the first years have led to improve- 
ments in the manufacturing and marketing methods which Knapp Brothers Manufacturing Com- 
pany now wish to present to the trade at large. 


Style No. 302 
Window Trim 


Appearance and 
Comparative Value 


Sanitary 
Features 


A Time Saver 
In Fimshing 
The Building 


Cost 


This style provides a method of trimming a window opening on the inside with the reveal 
lining and trim face in one continuous piece and finishing flush with the plaster walls. This 
trim can be used with any kind or type of window frame, either wood or metal. It can 
also be used as a door trim. 


AVENE Libtnil 
COLUMBIA UNIVERSIT' 
This method of trim produces in general appearance after decoration the same effect as 
when the plaster is returned in the reveal to the window frame. It has been found actually 
cheaper in the average window to trim it in this fashion than to return the reveals in 
plaster, due to the care and consequent high labor charge which is necessary in preparing 
and plastering the narrow strip of reveal. ; , 


Because this trim is plastered-in without projecting mouldings or ledges it allows absolutely 
no place for vermin to lodge or nest. At the jamb angles a cove fitting is provided which 
makes it possible to keep these angles free of dust or dirt with minimum labor. A damp 
cloth wiped over the trim periodically keeps it in a sanitary, cleanly condition. 


When the time it takes to wait for plaster to dry and then to trim out in the usual manner 
is considered it becomes apparent that the use of the Knapp Sanitary Trim saves weeks 
in the completion date of the building. This trim is ready for decoration as soon as the 


plaster is. 


Sanitary Trim and Stools are sold on the unit foot basis, prices varying according to the 
depth of reveal and the gauge of the metal. A fixed charge is made for each fitting and 
the attaching of same. These costs are available to architects on any specific building. 
Everything taken into consideration, this trim is much less costly than any other method 
on the market offering equivalent value. 


Kind and Gauge 
of Metal Used 


Method of 
Installation 


Time Consumed 
In Erection 


Grouting Under 
Stools 


Priming Coat 


Style No. 302 
Used as a 
Stool Only 


Style No. 304 
Flat Stool 


Style No. 305 
Splay Stool 


All trim and stools are made of special tight coat galvanized steel only. For the average 
reveal of about 4 inches or less (in a thirteen- inch wall) 20 gauge metal is sufficiently heavy 
for jambs and heads. Stool pieces should always be made of 18 gauge metal. Where re- 
veals are deeper than 4 inches, 18 gauge should invariably be used for all parts of the 
trim. Specifications should be carefully worded as to whether 20 or 18 gauge steel is 


desired. 


The contractor is required to furnish us with a schedule of the windows, giving the exact 
dimensions between what are to be the finished jamb lines and the finished heads and 
stools and the depth of reveal. The four pieces comprising the jambs, head and stool 
are made to exact size, and the corner fittings are attached at the factory and the joints 
made practically invisible. The material is sent knocked-down (to make it easy to handle 
and erect and to save freight and cartage costs) to the job, where all the contractor 
has to do is to assemble the pieces and set the whole in place. The contractor has to 
prepare the opening with the necessary grounds beforehand. 


Actual records show that two average men can assemble and erect two complete open- 
ings per hour. The trim is erected before plastering and acts as a ground line for 
the plasterer to work to. 


lt is important to have the stool pieces set in a bed of cement or mortar grout so that 
it is solid beneath. Instructions on the manner of doing this are furnished to the con- 
tractor. Specifications should call for this grout under all stools. 


All window trim, stools and fittings are primed with our own special galvanic primer. 
This prmier kills the oily surface of the galvanizing and sticks tightly to the metal. This 
primer is very tough and will not chip or flake off and can not be readily scraped off. 
It is water, acid and alkali-proof. Its principal function is to afford a base coat for subse- 
quent decorations and any kind of paint or enamel finishes can be applied over the 
primer. It is not of itself intended fora finish. It is usual to paint the trim after plastering 
the same color as the walls. Stools are frequently, for practical reasons, given a dark 
colored finish. These finishes can be done in connection with other interior painting or 
decorating and by the same contractor. 


Where window reveals are exceptionally deep it is sometimes thought economical and ad- 
visable to plaster the reveals and use a metal stool only. In these cases we provide a special 
cove corner fitting which allows our bull-nose corner head to be used to round and protect 
the edges of the opening. 


In some cases a flat stool with a projecting drip nose is desired. Our Style No. 304 Stool 
is intended for these cases. The same general principles of construction and erection apply 
to this design as to the others. The Style No. 302 used for jambs and heads with the Style 
No. 304 Stool is a popular combination. 


This stool is like the Style No. 302 except that the reveal is on a splayed angle 30 de- 
grees from the horizontal. This style is used where it is necessary to prevent the stool 


from being used as a shelf. 


FLUSH METAL WINDOW TRIM STYLE 302 »> FITTINGS 


Patented. 


ANY REQUIRED 
REVEAL DEPTH 


CZ COVE CDRNER 
FITTIN 


CEMENT Grout 
UNDHBR STOOL 


lana nose either 
VY V2 or % 


alls PERFORATED 


4 FOR PLASTER 
il KEY 


PLASTER 


SCALE 76 INCH=1INCH 


NOTE- Window trim is made up to requirements 
of openings and sent to the job knocked 
down but of exact size ready to set in 
place. Corner fittings attached at factory 


< Z 
; | oD 
é 


-\ SANITARY 


be \ COVE FITTING fe 
is Ne | STOOL PIECE 
See o> (2 SUNK INVISIBLE 
Or” stove Bours 


e A es : a . ce . i , 


DETAIL ELEVATION OF CORNER FITTING 
SCALE Ye FULL SIZE 


LE Ge OO | 
EET EDIE SIO DELLS FOOD EORTC, 
JAMB 
5 PIECE 
SASH 
| PLASTER | 
in pee ae \WooD STOP 


COVE CORNER 


FITTING 2 


PLAN SECTION THRU JAMB 
OF TYPICAL BOX FRAME 
SCALE YeIncH2 J incH 


THESE CORNER FITTINGS 
IN ANY REQUIRED DEPTH 
OF REYEAL 


“. PLASTER 


as) [eer 


ELE Vaso Neen 
OF INSIDE OF WINDOW 


Scope 


Gauge and 
Kind of Metal 


Erection 


Grout 


Priming 


limish 


Detail Illustration of Sanitary Cove Angle between Stool and Jamb Pieces 


SUGGESTIVE SPECIFICATION 


Where Style No. 302 is used to Trim Entire Opening 


All windows in outside walls of all rooms which are to be plastered shall be trimmed with Knapp 
Brothers Manufacturing Company’s Flush Metal Trim, Style No. 302, including sanitary cove corner 
fittings in all angles of the openings. The depth of reveals on the inside will be as shown by details. 
The curvature of the nosing of the trim shall be IV inches radius (or 34 inch if desired). 


The jamb and head pieces shall be formed of No. 20 U. S. Gauge tight-coat galvanized steel except where 
depth of reveal exceeds four inchs, in which case only No. 18 U. S. Gauge steel shall be used. 


The stool piece shall be formed of No. 18 U. S. Gauge steel only. 


The corner fittings shall be made of the best grades of cast iron, free of flaws. 


Contractor will furnish manufacturers with exact dimensions between what will be the finish lines 
from jamb to jamb and from head to stool. Material will be accurately sized at the factory and fittings 
attached there with counter-sunk stove bolts, heads soldered over so as to be practically invisible and 


trim will thus be shipped knocked down, ready to erect in place. Wood grounds required by details 
will be furnished in place by this contractor. 


Follow manufacturer’s instructions as to ‘assembly and erection. 


The stool pieces shall be set in a bed of soft grout of wall 
be solid beneath. 


plaster or cement so that when set it will 


Window trim shall be printed on its exposed face at the factor 


y with grey galvanic primer. Fittings 
will be dipped in primer. 


After plastering is completed, painter will clean off plaster cakes from surface of metal trim, putty all 
exposed counter-sunk screw holes, and paint to match walls. 


Stools will be painted a dark color as 
directed by Architect. 


WINDOW STOOL STYLE 302 »»> FITTING 


USED WITH PLASTERED JAMBS. 


Patented 


BULL NOSE 
CORNZR BEAD 


, PLASTER” 


SGI CON Saleh Rwme ose 


SCALE IQINCH = TINCH 


NOTE - This detail recommended where window 


reveals are exceptionally deep warranting PLAN SECTION THRU JA MB 
the plastering of the jambs. SCALE Z@INCH= LincH 

The curvature of the nose of this trim NOME: Any style of bullnose corner bead 
eo ape F és Cdn Be Vsed on Jambs ond Heads: 
is either I'/z or % radii. either 3/," or 145" radius Nose 


PS eis : Svs =, le est a = - 


BULL NOSE CORNER BEAD 
MITERED OR COPED 
AT CORNERS 


(Z | COUNTER SUNK INVISIBLE 
} STOVE BOLTS 
us| 


ECCENTRIC . 
COVE CORNER' | 


FITTING an , 


AMNION 
OF INSIDE OF WINDOW, 


DETAIL (ELEVA TTONGORSCORNER SEIT IGNG 


SCALE Ye FULL SIZE. 


Scope 


Gauge and 
Kind of Metal 


Erection 


eo” 


Priming 


Finish 


Detail Illustration showing how Bull-Nose Corner Bead is used with Metal Stool 


SUGGESTIVE SPECIFICATION 
Where Style No. 302 is used as a Stool only 


All windows in outside walls of all rooms which are to be plastered shall be provided with Knapp 
Brothers Manufacturing Company’s Style No. 302 Metal Window Stool, including sanitary corner fittings 
in the angles. The depth of reveals on the inside of these windows will be as detailed and returned 
in plaster, but the corner angles shall be protected with Knapp Brothers Bull-Nose Corner Bead Style 
No. 600 (or other styles as illustrated on details). 


The stool shall be formed from No. 18 Gauge U. S. tight-coat galvanized steel. The sanitary corner 
fittings shall be made of the best grade of cast iron, free of flaws, and moulded to the profile of the stool 
and also to act as a saddle for the bead as detailed. 


Contractor will furnish manufacturer with exact dimensions between what will be finished jamb lines, 
and stools will be accurately sized at the factory and fittings attached there with counter-sunk stove 
bolts, heads soldered over so as to be practically invisible. Stools will thus be shipped ready to 
erect in place. Follow manufacturer's instructions in erecting stools. 

Bull-nose beads will be erected plumb and straight, sitting tight on top of sanitary stool fittings and 
will be neatly coped or mitered at head and jamb intersections. Bead will be substantially nailed with 
cement-coated nails. Both stools and beads shall be erected prior to plastering and will act as a screed 
for the plasterer. 

Wood grounds required by details will be furnished in place by the contractor. 


The stools shall be set in a bed of soft grout of wall plaster or cement so that when set it will be 
solid beneath. 


The exposed face of stool and beads will be primed at factory with grey galvanic primer. Fittings will 


be dipped in primer. 


After plastering is completed, painter will clean off plaster cakes from surface of metal trim, putty all 
counter-sunk screw holes, and paint to match walls. Stools will be painted a dark color as directed by 
Architect. 


Patented 


WINDOW STOOL STYLE 304 »™ 302 STYLE HEAD» JAMBS gs 


Sy 
A 


aN oe 
aS ay 

So | 
NDEFIR STOOL 


ANY REQUIRED 
REVEAL DEPTH 


f 
| 


Seen 
eee 


© 


EIEIO 


\ 


/ 


‘ PERFORATED 
FOR PLASTER 
KEY 


PLASTER 


Sie tlONS hoe sero alee 


SCALE %BINCH= 1INCH 


tS feenstes: : : 

Strip of metal 
Yath 

PEAN= Sf Gi lO NS THe Ucar 


OF TYPICAL BOX FRAME 
SCALE 3 1NCH = TINCH 


COVE CORNERS / 


FITTING 
THESE CORNER FITTINGS 
IN ANY REQUIRED DEPTH 
OF REVEAL 
PLASTER | PLASTER 
i 5 : 
| a 
¥ 2 STOOL PIECE 
Proyects '/2" beyond plaster 302 JAMBS AND HEAD 
= — ——_—_—_—_—_; = tee } 
Flush with plaster—, 2 END : Z ND & 
! Ss eee se Ot iat ’ CLosuRE-‘ -) CLOsU™, 


tig SOS sO aistT oo Le oe 
EBEVADaEO IN 
DEV AoE EVA MONO teGOL NTE? Sete ee aan ston 


SCALE ep FULL SIZE 


Scope 


Gauge and 
Kind of Vetal 


Erection 


Grout 
Priming 


Finish 


Illustration of Windows with Style No. 304 Stool 


SUGGESTIVE SPECIFICATION 
Where Style No. 304 Stool is used with Style No. 302 Heads and Jambs 


All windows in outside walls of rooms which are to be plastered shall be provided with Knapp Brothers 
Manufacturing Company’s Style No. 304 Flat One-Piece Metal Window Stool and Style No. 302 Flush 
Metal Trim for the jambs and heads, including the sanitary cove corner fittings at the upper angles. 
The depth of reveal of these windows will be as detailed. 

The stool is to be notched out at the jambs as shown by plan-section detail of a typical window. The 
jamb pieces are to set thereon. 

The jamb and head pieces shall be formed of No.20 U. S. Gauge tight-coat galvanized steel except 
where depth of reveal exceeds four inches, in which case only No. 18 U. S. Gauge steel shall be used. 
The stool piece shall be formed of No. 18 U. S. Gauge steel only. The corner fittings shall be made 
of the best grades of cast iron, free of flaws. 

Contractor will furnish manufacturers with exact dimensions between what will be the finish lines 
from jamb to jamb and from head to stool. Material will be accurately sized at the factory and fittings 
attached there with counter-sunk stove bolts, heads soldered over so as to be practically invisible and 
trim will thus be shipped knocked down, ready to erect in place. Wood grounds required by details 
will be furnished in place by this contractor. Follow manufacturer's instructions as to assembly and erec- 
tion. 

The stool piece shall be set in a bed of soft grout of wall plaster or cement so that when set it will be 
solid beneath. 

Window trim shall be primed on its exposed face at the factory with grey galvanic primer. Fittings will 
be dipped in primer. 

After plastering is completed, painter will clean off ‘plaster cakes from surface of metal trim, putty all 
counter-sunk screw holes, and paint to match walls. Stools will be painted a dark color as directed by 
Architect. 


FLUSH METAL WINDOW TRIM STYLE 302 > FITTINGS 


DI EDA INPCONNEG TION Withee rie sAoH 


302 JAMB 


RADIOS OF 
NOSE EITHER 


V," oR my” 


Aq) s+ PERFORATED 
is] FOR PLASTER 


SECON 


SCALE MincH = TINCH 


JSAMB 
PIECE 


ice Wi Melk SiASial 


ing onap makes 
+ 


Cg) 
SANITARY 


Meer VE FITTIN 
De Oa 
. , 


SYVOOWK I wipsere 


1 
nee INVISIBLE 


sel Want ve < STOVE BOLT 
Pa AS a : J 


DETAIL ELEVATION OF CORNER FITTING 


SCALE Yo FULL SIZE 


This system of Metal Window Trim can be used equally well with any make of Steel Sash. 


Pate nied 


hr) 


CEMENT “NX 
(7) 
MEZAL LATH 
ove "PLASTER. 


PLAN SECTION THRU JAMB 


SCALE %INcHe | INCH 


RL FITTINGS 
RED DEPTH 


o> 


PLASTER. 
y 


aa 


COVE CORNER aw 
FITTING aR 


ELEVATION. 
OF INSIDE OF WINDOW 


This illustration shows a typical detail. 


Illustration of Style No. 304 Flat Stool used with Steel Sash 


Rapp 
MIMIC TAA \ROTAE” AIA 


Knapp Brothers Manufacturing Co. make a 
large line of Sanitary Metal Trim, including 
therein the articles represented and listed below. 
Literature thereon will be sent on application. 


Flush Metal Window Trim. 

Cove Corner Fitting for window trim. 
Flush Joint Plate for base. 

Inside Corner Fitting for base. 
Sanitary Plinth Fitting for base. 
Bull-Nose Corner Fitting for base. 


I. Flush Metal Picture Mould. 


. 


Il. Flush Metal Chair Rail. 


. 


Ill. Flush Metal Cove Base. 


. 


IV. Flush Metal Door Casing. Outside Corner Fitting for chair rail. 


Inside Corner Fitting for chair rail. 
End Stop Fitting for chair rail. 


OMmANADWNBWNH — 


V. Bull-Nose Metal Corner Bead. 


The principal articles in the line will be found 
listed in Sweet's Architectural Catalogue 


ee 


KNAPP BROS. MFG. CO., 1343 South 55th Court, CHICAGO, ILL. 


p Sanitary Metal Bas _ 


Styles 202-205-501 - 204 - 203 


7 


Photograph taken in a United States Public Health Service Hospital, showing Sanitary 


Flush Metal Base and Casings. James A. Wetmore, Acting Supervising Architect 


Knapp Brothers AGiapp Manufacturing Co. 


55th Court at 14th St. CHICAGO, ILE. 


ME, 
EAI Re ITT 


Introductory @ 


N this brochure on Sanitary Metal Base, glittering generalities and mere 
| VL Ip sales propaganda are eliminated and the attempt is made to present in brief 

- 5 and condensed form such information and facts as will enable the architect, 
the engineer or the builder to use these materials understandingly and to give the 
draughtsman and specification writer the details necessary to the preparation of 


working drawings and specifications. 


re 


oni 


S=5 


Knapp Sanitary Base designs are no innovation. They have been used for ten 
years. Improvements have been made to meet varying conditions of construction 
and to overcome criticism which grew out of earlier experiences. 


Knapp Brothers Manufacturing Company is the originator and pioneer of the San- 
itary Metal Trim Industry. Its study and effort is confined to this art and dedicated 
to its future improvement and development. 


Constructive criticisms and suggestions are invited from all sources and will be 
given grateful and careful attention. 


Brief, To-the-Point Facts About Sanitary Metal Base 


MATERIALS. They are manufactured of tight-coat galvanized steel. 


GAUGE. The 202, 205 and 501 styles are made from the both 18-gauge and 20-gauge; 
the 203 and 204 styles from 20-gauge only. 


PRIMER PAINT. The exposed surfaces are primed at the factory with a galvanic primer 
which gives a flat finish and becomes a bond over which any type of decorative finish, such 
as enamel, stain, paint, etc., can be spread and will adhere to the metal. 


FITTINGS AT CORNERS, DOORWAYS, ETC. A complete line of cast iron fittings is 
made to form inside and outside corners; returns or plinths at doors; and end stops for 
other terminating points. The corner fittings are made for square corners; 34” radial 
curved corners or 1!” radial curved corners. .The fittings for doorways are either the 
Sanitary Plinth (used only in connection with Sanitary Casings) ; the plinth block for wood 
casings or the end stop which provides a means for stopping the base and returning the 
cove to the wall. All fittings are easily attached and necessary machine screws and bolts 
are furnished for the purpose. Splice plates are furnished to make neat splice joints. 


CURVED WORK. Metal Base is designed primarily for straight runs. Curved work can 
be had to meet special conditions, but as curved work is difficult hand work and is expen- 
sive, it is best to avoid it where possible. Each case has to be treated as an individual 
problem. 


STOCK LENGTHS AND HEIGHTS. All styles of base are furnished either 4” or 6” 


, 


high and in stock lengths of 10’. They can, however, be furnished in 6’, 7’, 8’ or 9 
lengths at a 10% extra cost. 


TOOLS AND ERECTION INSTRUCTIONS. Tools for the proper erection of base are fur- 
nished when ordered. Complete instructions are furnished the erecting contractor. In 
large installations a competent supervisor is sent, if requested, to assist the contractor in 


erection problems se 
SPECIFICATIONS. Suggested brief specifications are given herewith. These suggestions 


can be enlarged upon as the specification writer may see fit. 


EAT 


PAGE TWO 


1G, 


cAI) “qk | 


My 


muoe tig irl PARK 
} f 


Flush Metal Cove Base (atentea) Style No. 202 


CEMENT OR 


“CONCRETE : ae 


SECTION 14 FULL SIZE 


LUSH WITH 
_ PLASTER. 


202 STYLE BASE 
Showing Sanitary Plinth Fitting at the Door 


This base is made of 18 or 


20-gauge galvanized steel. 


Fittings are furnished to 
form corners and returns 
at door, etc. (See page 
seven. ) 


Used largely with cement 
or composition finished 
floors. Its use is not 
recommended with wood 
floor joist construction. 


No wood grounds neces- 
sary. 


This base acts as screed 
ground for plaster and 


202 STYLE BASE i 
finished floor. 


obs 5 Te oe ee ee oie : : 

Pelee Cel coNene tr Wal Lae is ede oe the floor attachment 
eR) ei Bend Poh ica flange 4", 2" or 1” deep to ellow Does not shrink, war 
aX a eA Gg < for different thickness of finished : P, 


flooring materials. crack or break. 


SUGGESTED SPECIFICATION 
When Style 202 is to be used 


SCOPE, OF USE. Metal (Gove) Baseis: to be used at the intersection 
of floors and walls or partitions throughout the building except as 
otherwise called for. (State exceptions here.) 


TYPE OF BASE. The base to be used shall be Knapp Brothers Manu- 
facturing Company Style 202 Flush Cove Base 4” high (or 6” if de- 
sired), made of 20 S. gauge tight-coat galvanized steel (or 18 
gauge if desired), and the base shall be primed on the exposed face 
at the factory with gray galvanic primer. 


FITTINGS. At all corners both interior and exterior in all rooms and 
spaces provide %4” radius corner fittings which shall be attached to 
ends of base by concealed stove bolts. (See page 7 for other styles 
of corner fittings.) 


At all door openings provide a Sanitary Flush Plinth (or other 
style of terminating fitting) which shall be similarly attached to the 
ends of base. 


At other terminating points, such as at the head of stairs, provide 
an end-stop fitting. All fittings to be made of cast iron, free of 
flaws, and dipped in primer at the factory. 


ERECTION. Base shall be erected before plastering and shall be so 
set as to form a ground screed for plaster and for the finished floor. 
Care shall be taken to have same perfectly level and in true plane 
with the plaster. Where necessary to compensate for irregularities in 
the rough wall, wedge out behind upper nailing flange with wood 
wedges. Base shall be substantially nailed at frequent intervals with 
cement coated nails as indicated by detail. 


In fitting base to spaces, measurements shall be made and base 
lengths sawed to size on the job. For this purpose use Saw and Mitre 
Box furnished by manufacturers. Fittings before mentioned will be 
attached as per manufacturer’s instructions, and contractor will use 
the punch block made for locating holes in base flange for stove bolts. 


GROUT. After base is in place grout behind same with a mixture 
of Portland cement and sand mixed | to 3 to about the consistency 
of a thick sirup and poured with a grouting can through the holes in 
the upper flange of base. (Note: Grouting is not essential to a good 
base job. In fireproof buildings it is recommended for heat resistance 
and for general solidity.) 


PROTECTION FOR BASE. Base shall be protected against damage 
during building operations. When plastering, lay building paper or 
other protecting materials along the cove to catch plaster droppings. 
Upon completion of plastering and floor work remove all plaster or 
cement from the base, and where necessary for this purpose employ 
steel wool. 


FINISH. When finishing and painting, contractor shall give the metal 
base a coat of enamel undercoater and two coats of hospital enamel 
in colors as selected taking care to stripe the top and bottom of base 
in straight, even line. (Other finishes can be used.) 


AAT 


PAGE THREE 


Atiapp 


IT 


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Sanitary Metal Cove Base 


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SECTION 14 FULL SIZE 


1G, 


SANITARY, 
METALS 


PAS 


Patent 
(Pending) 


Style No. 205 


NAILED DIRECT TO 
PARTITION OR WALL 


COVE MEMB 
SCREWED TO Ft 


STYLE 205 BASE 
Showing Adjustable Cove Member and Corner Fittings 


This base has the flush-with-plaster feature of Style 202, but has an adjustable 
cove member which allows regulation to shrinkage or settlement in the floor. 
Its use is recommended with wood floor joist construction. 


SUGGESTED SPECIFICATION 


When Style 205 is to be used 


SCOPE. OF USE. Metal Cove Base is to be used at the intersection 
of floors and walls or partitions throughout the building except as 


otherwise called for. (State exceptions here.) 


TYPE OF BASE. The base to be used shall be Knapp Brothers 
Manufacturing Company Style 205 two member Flush Cove Base 
4” high (or 6” if desired), made of 20 U. S. gauge tight-coat gal- 
vanized steel (or 18 gauge if desired) and the base shall be primed 
on the exposed face at the factory with gray galvanic primer. 


FITTINGS. 
and spaces where base is used, provide %” radius two member 
Cove Fittings. The upper member of the fitting to be attached 
to the upper member of the base, the Cove member to be attached 
to the Cove member of the base. 


At all corners, both exterior and interior, in all rooms 


At all door openings provide a Sanitary Flush Plinth (or other 
style of terminating fitting), which shall be similarly attached to 
the ends of base. 


At other terminating points, such as at the head of stairs, pro- 
vide an end-stop fitting. All fittings to be made of cast iron, free 
of flaws and dipped in primer at the factory. 


ERECTION. The upper fiush member is to be erected before 
plastering and is to be set to act as a ground screed for plaster 
and must be in true plane therewith. Care must be taken to have 
it parallel with the fioor and so that the cove member will lap at 


least 34” over. Where necessary to compensate for irregularities 


in the rough wall, wedge out behind nailing flange with wood 
wedges. Base shall be substantially nailed at frequent intervals 
with cement coated nails, as indicated by detail. 


The cove member will not be erected until after the finished 
floor is laid and scraped. This member will be screwed to the 
floor, but tight contact shall be made with the upper member. 


In fitting base to spaces, measurements shall be made and base 
lengths sawed to size on the job. For this purpose use Saw and 
Mitre Box furnished by manufacturers. Fittings, before mentioned, 
will be attached as per manufacturer's instructions, and contractor 
will use the punch block made for locating holes in base flange 
to receive bolts. 


GROUT. After base is in place grout behind upper member of same 
with a mixture of Portland cement and sand mixed | to 3 to about 
the consistency of a thick sirup and poured with a grouting can 
through the holes in the upper flange of base. (Note: Grouting is 
not essential to a good base job. In fireproof buildings it is recom- 
mended for heat resistance and for general solidity.) 
PROTECTION FOR BASE. Base shall be protected against damage 
during building operations. Upon completion of plastering and 
floor work remove all plaster or cement from the base and where 
necessary for this purpose employ steel wool. 

FINISH. When finishing and painting, contractor shall give the 
metal base a coat of enamel undercoater and two coats of hospital 
enamel in colors as selected, taking care to stripe the top and 
botom of base in straight even line. (Other finishes can be used.) 


HTT 


eee eee eee 


PAGE FOUR 


Atiapp 


TTT 


4+ or 6” 


LINOLEUM pr 


 CeEmenT ow: lp. 
:WOOD FLopE... 5 


SECTION 146 
Note Method of Attachment 


FULL) SIZE 


ACTS AS 
PLASTER 
GROUND 


CEMENT OR © 


ITT 


BOTTOM 
FLANGE OF 
BASE STYLE 


NAILED TO 
PARTITION © 
OR WALL ~ 


ISH WITH PLASTER 
NO PLACE FOR 
ERMIN TO LODGE 


CEMENT OR 
PLASTER 


: GIDE CORNER 
COMPOSITION ) ING 
FLOORS 


FLUSH WITH 
FLOOR 


FLUSH METAL COVE BASE 


Showing an Exterior Corner with the Bull-Nose Corner Fitting 


used with a Bull-Nose Corner Bead 


Style 501 Base is the same in all particulars as Base Style 202 except for the 


difference in the lower flange which is designed in 501 to be attached to the 


wall or partition instead of to the floor. 


SUGGESTED SPECIFICATION 


When Style 501 is to be used 


SCOPE OF USE. Metal Cove Base is io be used at the intersection 
of floors and walls or partitions throughout the building except 
as otherwise called for. (State exceptions here.) 


TYPE OF BASE. The base to be used shall be Knapp Brothers 
Manufacturing Company Style 50] Flush Cove Base 4” high (or 
6” if desired), made of 20 U. S. gauge tight-coat galvanized steel 
(or 18 gauge if desired), and the base shall be primed on the ex- 
posed face at the factory with gray galvanic primer. 


FITTINGS. At all corners, both interior and exterior, in all rooms 
and spaces provide 34” radius corner fittings, which shall be at- 
tached to ends of base by concealed stove bolts. (See page 7 for 
other styles of corner fittings.) 


At all door openings provide a Sanitary Flush Plinth (or other 
style of terminating fitting), which shall be similarly attached to 


the ends of base. 


At other terminating points, such as at the head of stairs, pro- 
vide an end-stop fitting. All fittings to be made of cast iron free 
of flaws and dipped in primer at the factory. 


ERECTION. 
so set as to form a ground screed for plaster and for the finished 
floor. Care shall be taken to have the same perfectly level and in 
true plane with the plaster. Where necessary to compensate for 
irregularities in the rough wall, wedge out behind nailing flange 


Base shall be erected before plastering and shall be 


with wood wedges. Base shall be substantially nailed at frequent 


intervals with cement coated nails as indicated by details. 

In fitting base to spaces, measurements shall be made and base 
lengths sawed to size on the job. For this purpose use Saw and 
Mitre Box furnished by manufacturers. Fittings before mentioned 
will be attached as per manufacturer's instructions, and contractor 
will use the punch block made for locating holes in base flange for 
stove bolts. 


GROUT. After base is in place grout behind same with a mixture 
of Portland cement and sand mixed | to 3 to about the consist- 
ency of a thick sirup and poured with a grouting can through the 
holes in the upper flange of base. (Note: Grouting is not essential 
to a good base job. In fireproof buildings it is recommended for 
heat resistance and for general solidity.) 

PROTECTION FOR BASE. Base shall be protected against damage 
during building operations. When plastering, lay building paper 
or other protecting materials along the cove to catch plaster drop- 
pings. Upon the completion of plastering and floor work remove all 
plaster or cement from the base and where necessary for this pur- 
pose employ steel wool. 


FINISH. When finishing and painting, contractor shall give the 
metal base a coat of enamel undercoater and two coats of hospital 
enamel in colors as selected, taking care to stripe the top and 
bottom of base in straight even line. (Other finishes can be used.) 


CTT 


PAGE FIVE 


Ma 
IAA -ea 


oe MATA 


Sanitary Metal Cove Base ...4.., Style No. 204 


SCREWED TO FLO 


SECTION 15 FULL SIZE 
Two Grounds Required for the 6 inch Base 


STYLE 204 BASE 
Showing Adjustable Cove Member and Corner Fittings 


This. base is largely used with wood joist con- 
struction or in other conditions where shrinkage 
or settlement is liable to be excessive. 


No.39 FLUSH CASING : The adjustable cove allows the base to be regu- 
lated to the shrinkage. 


This base is well adapted to office buildings, 
where opportunity is afforded to run telephone 
wires around the room concealed behind the base. 


The specification follows exactly the same line 
o as that suggested for Style 203 except for the 

204 STYLE BASE lower member, which should be specified as being 
Showing Sanitary Plinth Fitting at the Door attached to the floor. 


HTT 


PAGE SIX 


cA 


ITT 


IH 
{ltt 


MT 


BRE 


LINOLEUM OR 
CARPET 


aN 


SECTION 14 FULL SIZE 


This base is largely used over linoleum or carpet, 


as it makes a good edge binder for these PINOEEY TOR CARPET “ 
materials, and provides a close contact therewith. 
Two Grounds Required for 6” Base 203 STYLE BASE 


Showing Corner Fittings 


SUGGESTED SPECIFICATION 
When Style 203 is to be used 


SCOPE OF USE. Metal Cove Base is to be used at the intersection 
of floors and walls or partitions throughout the building except as 
otherwise called for. (State exceptions here.) 


DYPE TOR BASE The! base. to) be used (shall be Knapp Brothers 
Manufacturing Company Style 203 one member Cove Base 4” high 
(or 6” if desired), made of 20 U. S. gauge tight-coat galvanized 
steel, and the base shall be primed on the exposed face at the 
factory with zray galvanic primer. 


FITTINGS. At all corners, both interior and exterior, in all rooms 
and spaces, provide square corner fitting which shall be attached 
to ends of base by flush head machine screws. 


At all door openings provide a Sanitary Plinth (or other style of 
terminating fitling), which shall be attached to ends of base by a 
flush head machine screw. 


At other terminating points, such as at the head of stairs, pro- 
vide an end-stop fitting. All fittings to be made of cast iron, free 
from flaws, and dipped in primer at the factory. 


ERECTION. %”x2” wood grounds, located as shown by detail, 
shall be furnished and set by the contractor where base is to be 
used. Also set blocking at intervals at floor line to hold base in 
true plane-—see detail. 


The base shall be set after finished linoleum (or carpet) is laid 
and be screwed tight to the ground. At all screw points, however, 
a wood block will be used over the ground to prevent depression in 
the base at these points. In placing base over linoleum (or carpet) 
see that a close contact is made therewith. 


Base will be screwed to wood grounds with flush head No. 6 
screws, spaced about 18” O. C._ Punching holes for these screws in 
base will be done at factory. Where necessary to punch any addi- 
tional holes on the job same shall be done with punch block fur- 
nished by manufacturers. 


In fitting base to spaces, measurements shall be made and base 
lengths sawed to size on the job. For this purpose use Saw and 
Mitre Box furnished by manufacturers. Fittings before mentioned 
will be attached as per manufacturer's instructions, and contractor 
will use the punch block made for locating holes. 


FINISH. When finishing and Painting, contractor shall give the 


STYLE 203 BASE metal base a coat of enamel undercoater and two coats of hospital 
3 "i G ae enamel in colors as selected, taking care to stripe the top and 
Showing Sanitary Plinth Fitting at the Door bottom of base in straight even line. (Other finishes can be used.) 


CAI 


PAGE SEVEN 


Corridor in St. Elizabeth Hospital, Lincoln, Neb. 
J. M. Nachtigall, Architect 


Corridor in U. S. Public Health Service Hospital 
J. A. Wetmore, Supervising Architect 


NM 


PAGE EIGHT 


IAA ee AA 


Aig 


METAL CASINGS 


STYLES 34-35-36-37-39-40-41-70-71-72-73-74-75-76-77-78 


ALL CASINGS FURNISHED IN STOCK LENGTHS — 6’-7’-7'4”-8'-9’-10'-12/ 


Knapp Metal Casing 
is an important part 
of the complete line 
of Knapp Sanitary 
Metal Trim. This 
fact is attested to by 
the wide use of 
Knapp Metal Casing 
buildings 
everywhere. It is es- 
pecially adapted for 
use in all kinds of 
public buildings, 
hotels, hospitals and 
schools. 


in fine 


Nite Paster Key ss. 


- Close Mitered 
Joints 


| Moulding 
Applied to 
| Cover Joint 


Sanitary 
Flush Plinth 


—_—___—_—_—_eee— — _________eessss—C—i 


The accompanying 
drawing, in addition 
to indicating in a 
small measure the 
handsome simplicity 
of Knapp Flush Door 
Casing, also suggests 
its sound structural 
merits. The drawings 
and explanations on 
the following pages 
describe the various 
styles of Knapp 
Metal Casing in de- 
tail. 


This Circular and Its Illustrations Copyright 1926, by Knapp Bros. Mfg. Co. 


Page Two 


SAapp 
SEAR 
TRS) 


AMINA a 


a 


STYLES 39 AND 36 


Zu PANEL 


N° 39 CASING 


COUNTERSONK SCREW 


en a ae 


CASTE. aa 
N° 36 CASING 

This folder on Knapp Flush Metal Casing method being more generally used than ever 
is designed to present in brief and con- before, due to the low cost, simplicity of detail, 
densed form such facts as will interest the archi- sanitary considerations and low upkeep. 
tect, engineer, builder, 
draftsman, and specifi- 
cation writer. 

Knapp Flush Metal 
Casings have been used 
for ten years. This 


The Casings on this 
erected in 
the wood 
The plaster 
is brought up to finish 


page are 


place of 
grounds. 


folder describes them as 
they are today—em- 
bodying a number of 
improvements — which 
have been evolved by 
years of use. 

B* Se ¥ 


The Knapp Metal 
Casings herein _ illus- 
trated, allow the door, 
window, vent grilles, 
recessed cabinet, or in- 
terior borrowed parti- 
tion lights, to be 
trimmed flush with 
the plastered surface, a 


FLUSH WITH 


FLOOR 


CASING 


flush therewith. After 
the plaster has dried, 
the wood frames are 
placed in the rough 
openings in the usua! 
manner and either Style 
No 24). or sNoww2o 
Moulds are 


cover the 


used to 
intervening 
joint as illustrated. 

They are made for 
grounding the plaster 
to either a 1% inch or 
34, inch thickness. 


Aapp 
LAMINA 


Ny o 
i} 
tly 


STYLE.37 
OVAL HEAD SCREW 


Ne 37 CASING 


aN 
WW 


DOOR. 


- 


X. 


DAWES 
eee 


——— ; 


< 


N° 37 cASING 


In Casings, Styles No. 37 and No. 39, an extending 
plaster key flange bridges the rough buck, allowing a 
plaster bond at the point where it is most needed. 

Casing, Style No. 36, is designed for lathed parti- 
tions or other places where the plaster key flange is 
unnecessary. 


practical. 


All of these casings are 
made of extra tight coat gai: 
vanized steel, in 26, 24 and 
20 gauge, except No. 37, NERA 5 pas 
which is made in 20 gauge bs Nese tates | 
only, and the exposed face 
is primed at the _ factory 
with our special grey gal- 
vanic primer. 


CASING 
Sica 
40-4] 


‘CASING 
“STYLES 
36-31-39 


\--NMel width of Door | - 


The sanitary plinth fitting 
for use with Casings, Styles 


Nos. 36, 37 and 39, herein 


7 of Door 


Dimension /rside Ff / fers 


illustrated, can be used in N 
connection with our own h 
Cove Metal Base, but are 3 


also a desirable termination 
for flush cove, cement, com- 
position or Terrazzo Base. 
These plinths are furnished 
4 inches and 6 inches high. 


SECTION 


ELEVATION 


To Apbive AT MITERING DIMENSIONS 
ADD TO NET WIDTH AND HEIGHT OF 


All Casings are sold in 
DOOL THE DIMENSIONS QUESTIONED(P) 


stock lengths of 6’, 7’, 7’4”, 


SASZ 


Peer 
ac cee 
as 
LO COXs: 
OO. 
oboe 


ee RPEASTE RCs 


IN ABOVE DIAGRAMS 


8’, 9" 10? and 12’, and are 
cut to length on the job in 
an ordinary miter box. 


Page Three 


‘ SITAR ~ 


Fics mae Were 


soe 
S 


Frequently, however, it has been found more eco- 
nomical to have them cut and mitered to exact sizes 
at the factory, a service which can be given at very 
little extra expense. We urge that this be done where 
A diagram showing how to order mitered 
casings is shown in this folder. 


It is desirable to use door 
checks where any type of 
flush finish is used. Our 
Casings are no excepticn, 
but we guarantee that even 
without checks our Casings 
will be less likely to show 
plaster cracks than _ other 
types due to our designs. 


These Casings can be fur- 
nished for curved head 
openings. When this is de- 
sired, special quotations can 
be given for furnishing 
curved pieces. 


In the use of these Cas- 
ings for doors, it is highly 
important to have the rough 


buck solidly anchored 
against jar. 
We strongly advise the 


use of our own buck anchor. 
Information will be sent on 
request. 


Page Four 


Aiapp 


a If ms 


inicio Ne eA ; CON 


i 

AAD) i y 
My y 

\\ \" 


a 


Knapp Sanitary Flush Metal Casings — Styles 40 and 41 


Furnished in Stock Lengths of 6’, 7’, 7’4’, 8’, 9’, 10’, 12” 
Made for both 14” and 34” thicknesses of Plaster 


VANIOES Strong Hemmed Edge 


N° 41 


Note- Tight Contact Due 
To Arch aes 


POP L MST EOS rl eee ace ice eee ed 
oa Perforated, for plaster Keven. 


SESS 
aati 
SOROS 


EDEL 
SOE KK RS 


Oe PUASTE Di al mua 


. oe & ae 


FULL SIZE DETAILS 
No. 41 CASING WITH FLANGE FOR SOLID PARTITIONS 
No. 40 CASING WITHOUT FLANGE FOR LATH PARTITIONS 


SANITARY METAL CASINGS 


These casings are particularly ideal for trimming door open- 
ings, borrowed lights, vent grilles and other similar openings in 
partitions. 

They form a part of our complete system of SANITARY 
FLUSH METAL TRIM, but can also be used independently of 


FLUSH WITH METAL the rest of the line. 


PLASTER 


They are made from 24 and 26-gauge, extra-tight coat gal- 
vanized steel and the exposed face is primed with grey galvanic 
primer at the factory. 

They are sold in stock lengths mentioned above or can be 
mitered at factory and sent cut to given lengths for a trifle more. 

THEY ARE SELF-GROUNDING and are made for either &3 
Yy-inch or 34-inch plaster thickness. 

The plinth fittings illustrated to the left can be used with our 
COVE METAL BASE, but they also make a desirable termina- 
tion for flush cove cement, composition, or terrazzo base. Bases 

Nee CRCING are furnished 4 inches or 6 inches high. 
Used with Sanitary Metal Plinth 


HA 


ILLUSTRATING A TRANSOM 


The left side of the illustration shows No. 41 
Casing in place before plastering; the right side, 
after plastering. Note Plaster Key Flange. 


Page Five 


Uti 


METAL : 
LATH PARTITION @ -* 


No. 40 CASING 


Illustrating its use on a lathed partition, showing 
how the lath is brought up to the nailing flange. 
This casing is also used with wood lath or plaster 
board in the same manner. 


SUGGESTED SPECIFICATIONS FOR SANITARY METAL CASINGS 


SCOPE OF USE. All interior doors, borrowed lights, 
vent grilles and recessed cabinets are to be trimmed 
with KNAPP No. 41 (or, if on a lathed partition, 
No. 40,) Sanitary Flush Metal Casing. Note: If the 
Sanitary Plinth is desired, add the following here: 
“At all door openings provide KNAPP Sanitary Flush 
Plinth fittings (either 4 inches or 6 inches high) for 
use with (name the kind of base material). The 
casings will be set on top of these plinths. Casings 
shall be primed at the factory with grey galvanic 
primer.” 


PREPARATION. Before casing is erected THE 
ROUGH BUCKS MUST BE SECURELY AND 
SOLIDLY ANCHORED so as not to be loose in the 
partitions, as movement in the bucks will cause plaster 
cracking around the openings. 


Finished frames will be primed and set in place in 
the openings and protected by ordinary building paper 
before plastering. 


ERECTION. “After finished frames are in place, con- 
tractor will erect trim, taking care to NAIL CLOSE 
UNDER THE ARCH OF THE NOSE SO AS TO 


MAKE A TIGHT CONTACT WITH THE FRAME 
AND THE EDGE OF THE PLASTER KEY FLANGE 
MUST ALSO BE SECURELY NAILED TO THE 
PARTITION AT FREQUENT INTERVALS. 


Jamb pieces will be plumbed and head pieces leveled 
and mitered corners shall be neatly and tightly made 
so as to be inconspicuous. Where possible, contractor 
will furnish manufacturers with exact length dimen- 
sions and have pieces mitered at factory and shipped 
ready to erect. 


As this trim forms a ground for the plaster, care 
shall be taken to set casing with proper allowance for 
plaster thickness. When plastering, brown coat shall 
be forced well behind nose of casing and into per- 
forated keying flange. Finish coat shall be screeded 
off flush with casing. 


PROTECTION. Protect all jambs after erection 
with boards nailed temporarily about five feet high. 
Remove these on completion of plastering. 


FINISH. After plastering is completed, clear any 
plaster marks off from exposed surface and paint trim 
to match adjoining wall. 


Page Six 


Knapp Perforated “Widaflange” Casings 


STYLES No. 70-71-72-73-74-75-76-77-78 


re 4" or 5" 


No. 70—24 gauge 4” ““WIDAFLANGE” CASING No. 75—26 gauge 5” “WIDAFLANGE” CASING 
No. 71—26 gauge 4” ““WIDAFLANGE” CASING No. 76—20 gauge 5” “WIDAFLANGE” CASING 
No. 72—24 gauge 4” “WIDAFLANGE” CASING No. 77—24 gauge 5” “WIDAFLANGE” CASING 
No. 73—26 gauge 4” ““WIDAFLANGE” CASING No. 78—26 gauge 5” “WIDAFLANGE” CASING 


No. 74—24 gauge 5” “WIDAFLANGE” CASING 


To meet the demand of a light weight, low priced casing, the following types in both 24 gauge 
and 26 gauge material are offered. 


PLASTER, : eae " é 


- eee SEONG NESS: ELAS TRERSK EY 
—‘~ 


Se] STAB USER 
RO aSRGMS 


No ZOWIDAFLANGE. 
CASING 


TILE OR Grp. |)> 
; ise : ( 
\ PARTITION } 


SS oy . 


No.72 ‘WIDAFLANGE ™ TONES is chat meek: Saeeene 
CASING 


Scale of this drawing—full size. 


The erection of all ““O-G’’ type of Casing is greatly facilitated by the use of No. 45 Casing clip 
illustrated on last page. 


The tension of this special clip forces the nose of casing down in tight contact with finished jamb, to 
compensate the slight consequent shrinkage of the wood jamb. 


STYLES 34 AND 35 


Page Seven 


QAUTION:— THE FINISH WOOD JAMB MUST BE OF 


NQ 34 CASING 


AND NO 34% GROUND 


Ww 
No 


SUCH WIDTH (VARYING WITH THICKNESS 

OF PARTITION AND PLASTER) AS TO KEEP 

THIS DIMENSION CONSTANT - IN OTHER WORDS 
THE FINISH WOOD JAMB MUST ALWAYS BE |” 

LESS IN WIDTH THAN THE THICKNESS OF THE 
PARTITION FROM FINISH PLASTER TO FINISH PLASTER 


WITH EXPANDED METAL FLANGE 


SOSSSARAAS CUT ANON 


see 


Bo DENSTER. 


“SPY DANDED METAL > abe 
POUT FLANGE WELDED. TO-GROOND’ 


oy 


WIDTH OF FINISH WOOD JAMB 


NOES OS COM SHINIG 


AND NO 352 GROUND 


Scale of this Drawing 34” = 1 


ROUGH BUCK 


HIS DETAIL ILLUSTRATES A BUCK 


my 

cory 

aq as 
, 

, 

2 p=S 

j A 
are 


34 


eee, 7 

jedan) se? 

fase deri 

Por 

2) aes 
x le ee 
creas 

Cb Oe 4 

Bocaire 


Si 
Sx 
2EX 


ADE FROM COMMON DIMENSIO 


oe 
o 9 


TaN 


Tica 
Nie elias 
a 4 

Ue 
‘ 


e . 
. 
ae 
EY 
rt 
Qo 
’ 
i; a 
Pe\e ¢ oF 
VOCE 
* . 
oF 
° ne 
Zs 4 


” 


Showing Detail of Nos. 34 and 35 Door Casing 
and Nos. 34; and 35: Grounds 


(Patented ) 


This ““Two Member’ casing is a recent innovation, but beyond the experimental stage. It conforms to the 
requirements of many architects who prefer that the finished jamb and face member be installed after 
plastering and eliminating the necessity of an additional mould member to give it a finished appearance. 


Plinths to fit our various designs of metal base are available for use with these casings. 


Principal Features 


1—Can be applied immediately after plastering 
is done—not necessary to wait a long time for 
plaster to dry out thoroughly nor to have the finished 
jambs in place before plastering. 

2—The exposed surface is furnished with a 
special galvanic primer at factory. 

3—Can also be furnished if desired with a vel- 


vety “Duco”’ finish in selected colors. 

4—Screws may be countersunk or oval head as 
desired. 

5—Made of heavy 16 gauge tight coat galvanized 
sheet steel, to prevent dishing of face member. 

6—Furnished in 6’, 7’, 7’4”, 8’, 9’, 10’ and 
12’ lengths. 


Page Eight 


Knapp Casing Clip No. 45 


(Patent Applied For) 


{ 


Detail Showing Application of No. 45 Case Clip. 


CASING CLIP No. 45 for expediting the installation of Nos. 40, 41, 70, 71, 74 and 75 Casings. This 
clip serves a double purpose, viz: 
(1) It acts as a tension spring forcing contact of the nose of casing with the finished wood jamb and 
holds it there. 


(2) The long slot in the clip permits the nail to be placed in just the desired spot which can be so 
placed without danger of denting the face of the casing. Care should be used to drive the nail 


down just tight enough to cause considerable tension. 


The clips should be placed about 18” apart or as conditions require in each particular case. 


Knapp Brothers Aftapp Mfg. Company 


‘ \SANITA Y, 
w METAL ARS v/ 


1343 So. 55th Court TRIM fh Chicago, Illinois 


Knapp Sanitary Metal Chair Rail and Fittings 


Furnished in stock lengths of 10 feet 


” PLASTER 


CHAIR RAIL No. 300 
Showing End Stop Fitting 


5 Des 


Attached PLASTER’ 
sien - : > 
vat ay fe - 5. 
Lo Full Size Section 
This chair rail is made from 18 gauge galvanized interior and pees corners, both square and rounded 
steel and the exposed face is primed with grey gal- to #4” and ia radii. An end stop fitting is furnished 
vanic primer. Fittings of cast iron are furnished for for terminating ends. 


Suggestive Specification for 


Chair Rail 


Furnish and erect in all rooms and 
corridors KNAPP No. 300 PLAS- 
TERED-IN METAL CHAIR RAIL. 
This will be erected before plastering 
at height above floor as directed, and 
will be so set that the edges act as a 
screed line for plasterer. Chair rail 
will be securely nailed to construction 
at frequent intervals. All joints shall 
be neatly made, close, and inconspicu- 
ous, and joint plate will be used for 
this purpose. At all corners both in- 
side and out use cast iron corner fit- 
tings furnished for the purpose, same 
to be for 34” radius corners (or 
114” radius or square). These fittings 
will be attached as instructed by 

a manufacturers. Fittings will be dipped 


in priming paint at the factory. At 
all door openings or other terminat- ILLUSTRATING TYPES OF FITTINGS 


ing ends use similar end stop fittings. USED WITH CHAIR RAIL No. 300 


KNAPP BROTHER'S SANITARY? MANUFACTURING Co. 


SS awe an CHICAGO, ILL. 
1343 So. 55th Court 


Ce ee 1 1 ee omen eee eH cee | | | | | | | | | || S| | Se || | ce jae |} ce | ce je} ee 


— |) |) || ee jf <4 


Kl | || | | | | | | | || | | SL | | | || || |) || || || | |e | jm 


| Knapp Sanitary Butt-Nose Beads 


STYLES 604, 607, 14, 1414, 600, 603 
Furnished in Lengths 6, 7, 8, 9 and 10 Feet 


Photograph showing Knapp Heavy-Duty Bull-Nose Bead Style 600 erected—ready for 
plaster in connection with Knapp Flush Sanitary Metal Base. 


SUGGESTED SPECIFICATION FOR BULL-NOSE CORNER BEAD: 


The contractor will furnish on all sharp vertical 


corners throughout the building KNAPP BROS. MFG. 
CO.’S Bull-Nose Corner Bead Style number (here in- 
sert catalog number of beads herein illustrated). 

These beads shall be made from tight coat gal- 
vanized metal and the exposed nose shall be primed 
at the factory with grey galvanic primer. 

All beads shall be erected before plastering plumb 
and straight and shall extend from top of base to 
ceiling. Flanges of beads shall be nailed to the con- 


KNAPP BROTHERS 
55th Court at 14th Street 


et ee tf |e ff ef | | |S || || |) || | | | fa ff a || | | | | | 


struction at frequent intervals with large headed nails. 
Care shall be taken to get proper ground distance, as 
the beads are to act as a screed for the plasterer. 


(NOTE—In the cases of beads 604 and 607 specify 
that they shall be held to construction by the Hump 
Clip, spaced | foot apart.) 


Where necessary to splice lengths such splicing 
shall be done on the job by the contractor in a neat 
and workmanlike fashion. 


MANUFACTURING Co. 
CHICAGO, ILL. 


mt tm fj me | mm 5 | me 5 jm 4 | mf mj mf | mf | | | ee || me || | 


TOE ee eee ee eee ee ee te ef | | | | | | | | || || | | | | fa | | je ff) me fee ff | ee jj eee jf te) et | ete 


: Attapp 


TATA‘ eRT 


No. 144% BULL-NOSE BEAD 
Medium Length Flange. Nose 34” Radius. 


No. 14 BULL-NOSE BEAD 
Long Corrugated Flange. Nose 34” Radius. Patented. 


RAN ag OS IE Oe ILE 
SECTION No. 1416 SECTION No. 14 
Full Size. Full Size. 


Furnished in Lengths of 6, 7, 8, 9, 10 and 12 Feet. 


eee ee eee a 


PAGE ONE 


No. 600 BULL-NOSE BEAD. NOSE 3%” RADIUS. 


Patented. 
Heavy Duty Reinforced Nose. 


Long Corrugated Flange. 


No. 603 BULL-NOSE BEAD. NOSE 116” RADIUS. 
Heavy Duty Reinforced Nose. 


Patented. 
Long Corrugated Flange. 


pessessSSSllnryy, © 


of 2 
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SECTION No. 600 SECTION No. 603 
Full Size. Full Size. 


Furnished in Lengths of 6, 7, 8, 9, 10 and 12 Feet. 


eee 


PAGE TWO 


; Atiapp 


NT A a A 


Bull-Nose Corner Beads, Styles 604: and 607 


‘AQ ON petacHasie 
. occu 


604 with Peemnpe Sie J Mp 
Clip Attached abe ff ious Ag ‘ ; 2 oN 
(Ch ips hak a) S ) ‘ B oie 
(Patent Pending ‘ MORTA R JO INT ; 
on Clip) * a s - ‘ A A ‘ 


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° View ie as es, ete ah ere 
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t} e Se wielete 
a 
Full Size Section 


No. 604 BULL-NOSE BEAD. NOSE %” RADIUS 
Short Flange. Hump Clip Required. 


QQ F?K perce 
. i vA as may CLIP 


607 with ““Hump”’ 
Clip Attached 


~, » . 4 < So 4 . TSX 
(Clips Extra) 5 Sipas ‘ : ae. 
pee \. MORTAR JOINT’ * "5 
on Clip) ; 4 ° 4 ’ ; : 


4 
’ 


Full Size Section 


No. Sa pene et BEAD. NOSE 114%” RADIUS 
rt Flange. Hump Clip Required. 


Furnished in Lengths of 6, 7, 8, 9, 10 and 12 Feet. 


steerer 


PAGE TH 


Aiapp 


(NAA SRR IAAT 


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TRAD. RIP nan 
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Knapp Sanitary Metal Cove No. 43 and Fittings 


NS 


This cove, with the fittings which go with it, 
is used in new or old buildings, and provide 


an easily cleaned corner floor angle. 
Particularly adapted to wood base, where 


it replaces the quarter-round moulding. 


The illustration on the right shows the fit- 
tings furnished for inside and outside corners 
and the end stop fitting used at doorways or 


& other terminating points. 


This cove can also be furnished in Brass. 


Prices upon request. 


MMMM 


KNAPP BROS. MFG. CO., 


LINOLEUM OR CARPET 


(Patented) 


Furnished in Stock Lengths of 10 Feet 


SUGGESTED SPECIFICATION 
For No. 43 Cove and Fittings 


Furnish and erect in connection with all base boards through- 
out the building, except as otherwise shown or specified, the 
KNAPP No. 43 METAL ANGLE COVE, together with the fit- 
tings for inside and outside corners and the end stop fittings at 
all door openings or other terminating points. 


This cove shall be made from extra tight coat 24-gauge gal- 
vanized steel and the exposed face will be primed at the factory 
with grey galvanic primer. The fittings, above mentioned shall 
be made of the best grades of cast iron, free of flaws, and shall be 
dipped in the primer. Provide splice plates for all spliced 
joints so that cove shall be in a continuous line and plane. 


Cove will be laid after floor coverings have been stretched 
and will be drawn up tight in the angle and held securely with 
No. 6 flush head screws 171% inches on center. Countersunk 
holes for screws will be punched at factory. The fittings 
will be provided with attachment lugs and will be attached as 
per manufacturer's directions. 

This cove and fittings will 


Taga toa SCREW be painted or enameled on 


the job just prior to erection 
in colors as directed. It is 
best to do this after cove has 


been cut and fitted to the 


spaces and fittings attached 
and just before laying. 


DETAIL OF No. 43 COVE AND FITTINGS 


ee 


BASE SOM opthe COURT CHICAGO MIE: 


Knapp Sanitary Metal Cove 


KNAPP No. 43 COVE, with 
the fittings which go with it, are 
used in new or old buildings and 
provide an easily cleaned corner 


floor angle. 


Particularly adapted to wood 
base where it replaces the unsatis- 


factory quarter-round moulding. 


This cove and fittings also fur- 


nished in Brass. 


Edge and Cove Binders 


Made of heavy gauge hot galvanized steel, finished with a special tight 
coat metallic surface. Furnished in 10 foot lengths. Counter-sunk screw 
holes, 6 inches in centers. 


(We do not furnish the screws for the Edge-Binder on account of the 


E 
LA 


great variety of floors. ) 


Milled edges of binder made tight 
grip and sanitary contact with lino- 
leum. 


WOOD BAS 


Allows adequate expansion and 


contraction, thus preventing sears SPS etna 


buckling of linoleum. ; 
A I TmiNeLE OM 
Ve Z 


al 
These binders also furnished in Mees 
ii. oe 
SO FLOOR 


—_— 


brass. 


KNAPP BROTHERS MANUFACTURING COMPANY 
1343 SOUTH 55th COURT CHICAGO, ILLINOIS 


Knapp Concealed Sanitary Metal Picture Moulds 


Furnished in stock lengths of 10 feet 


No. 23 “ECLIPSE”? PICTURE MOULD—26 Gauge Galv. 


Full Size Section 


These picture moulds present a sanitary method In some cases it is considered desirable to fill the 
of supporting pictures or other hanging objects. groove with plaster, cutting out for picture hooks 
Th fates ; 4 only where wanted. It is possible, however, to keep 

eveea Ss actecte ASD AEM EB NG SORBED EN the groove open by inserting a cord therein, before 
plaster ground line. plastering which is easily removed after. Especially 


adapted to schools, offices, buildings, etc. 


SPLICE PLATE 
FOR JOINTS 


& Full Size Detail No. 20 “ROYAL” PICTURE MOULD—26 Gauge Galv. 
Patented 


MANUFACTURING Co. 
CHICAGO, ILL. 


KNAPP BROTHER’S 


SS ee 
1343 So. 55th Court 


PTTTTTITITIITIITTTTTTTi Lilith aleeaeeieieeiaieteieheheieiehebeielebelae 
—_—_—_————————————————— a 


Knapp Metal Base Grounds and Screeds with Fittings 
STYLES Nos. 1, 114, 2, 42, 49 
Furnished in stock lengths of 10 feet 


No. 1 FLUSH GROUNDS—26 Gauge Galv. eee e moray, . 


No. 1144 FLUSH GROUNDS—24 Gauge Galv. Plaster Thicknesses 


These grounds form a permanent separa- They prevent contact between non-afhliat- 
tion between two different plastic materials as ing chemical constituents and therefore pre- 
in the case of terrazzo, composition or cement vent staining. 
base and plaster. They are also used as a They eliminate the necessity for temporary 
protecting border bead in the case of depressed wood grounds and ninety per cent of the 
or raised plaster panels. ordinary plaster patching. 


BOR SR OTERO CCRC C RRR R CRRA RESO C ECCT CHC T CET CTC SPER RCT TCC R EERSTE RRR E CAST PES H TESTER CSC H CRESS ECKERT ER CR SATE RRR R RETEST CSCS HSRC ESET TCR SHC R CHS S TSEC HCC R ESS S ESE C SSH C CR ET CE RET ESTES TRS S HSE SE SRST SSSR SESE SE SESE S SSS ESSE SSSR ESSE SEES SEES 


No. 2 FLUSH GROUNDS—26 Gauge Galv. 


Made for 14” and 34” Plaster Thicknesses 


Full Size Section 


NG, 
KNAPP BROTHER'S “sanranxy MANUFACTURING CO. 


METAL 
VAT OSI-5 AV +4+h-S we (ite CHICAGO, ILL. 
1343 So. 55th Court 5 


et 
Semen eRO ROS DERSRSREERORORRCORSRESSR USSR ESTERS ERE R CSD DO RECS CR CRSA CURR C RESO SEER SHER ROR SSSR TREO R SECRETE RESO ROR SR RESO ROCKER SER ER STEERER CDEC SESS SR SE RASS SERS SER SESS STRESS SE RES EERE SHEER SR SESE SESS EER EE SESE EES E ERS 


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ICMR 


MN 


or 


SANITARY, 
\SMETALS 


PATA 


TYPE OF CORNER FITTINGS 


USED WITH FLUSH METAL BASE GROUNDS 


Made for Exterior Corners, Both 34” and 114” Radii 
Made for Interior Corners, Both 34” and 114” Radii 


SUGGESTIVE SPECIFICATION FOR FLUSH BASE GROUNDS 


The contractor will furnish and erect KNAPP 
No. 2 (or No. | or No. 1!4) flush base ground, 
wherever flush cement (or other) base mate- 
rials is to be used. This ground is to act as 
permanent screed line for both plasterer and 
base worker and will be erected perfectly 
horizontal and parallel with the finished floor. 
The nose of the ground will be in true plane 
with the plaster, and where necessary to com- 
pensate for irregularities in the rough partition 
wedge behind nailing flanges of ground with 


KNAPP BROS. MFG. CO. 


—-.-————-.——-=---— 8 
1343 So. 55th Court, 


wood chips. Grounds will be securely nailed 
at frequent intervals, and where joints occur, 
care shall be taken to make them close and 
inconspicuous. — 


At all corners both inside and out in rooms 
or places where grounds are used provide 
KNAPP CAST IRON BASE GROUND 
CORNER FITTINGS 34” round (or 114"). 
These shall be dipped in priming paint at the 
factory. 


ae eee eee 


., CHICAGO, ILL. 


Atiapp 


ee \SMETALY” oan 


No. 49 CURVED POINT BASE SCREED—26 Gauge Galv. 


These screeds form a smooth even curved 
‘top for any projecting plastic base material 
such as terrazzo, cement or composition and 
protect the top of the base against damage by 
chipping. 


nnn 


Full Size Section 


They also—like the flush type of grounds— 
form a permanent separation between the two 
materials, and a working ground line for both. 


With the fittings hereafter illustrated these 
can be used in any class of building. 


: C 
No. 42 CURVED POINT BASE SCREED—26 Gauge Galv. Gi 
r ; J 


Full Size Section 


aa inn 


KNAPP BROS. MFG. CO., 2 


Pa = so ae =e 
1343 So. 55th Court, 


4 (EICACO,, IIb l. 


«MMC 


ION 


1G, 


SANITARY, 
METAL, 


wor 


MAIR 


ILLUSTRATION SHOWING TYPE OF CORNER FITTING 
USED WITH CURVED POINT BASE SCREEDS 


Made for Exterior Corners, Both 34” and 114” Radii 
Made for Interior Corners, Both #4” and 112” Radii 
For Both Styles 49 and 42 Screeds 


SUGGESTIVE SPECIFICATION FOR CURVED POINT SCREEDS 


The contractor will furnish and erect Knapp 
No. 42 (or 49) Curved Point Base Screed, 
wherever cement (or other) base material is 
to be used. This screed will form the top of 
the base, and will also act as a screed line for 
both plasterer and base worker and will be 
erected perfectly horizontal and parallel with 
the finished floor. Where necessary to com- 
pensate for irregularities in the rough partition 
wedge behind, nailing flanges of the screed 


KNAPP BROS. MFG. CO., 


il 


OF 5 — WW 4h SS 


with wood chips. Screeds will be securely 
nailed at frequent intervals and where joints 
occur, care shall be had to make them close 
and inconspicuous. 


At all corners, both inside and out, in rooms 
or places where screeds are used provide 


KNAPP CAST IRON BASE SCREED FIT- 
TINGS 34” round (or 114”). These shall be 
dipped in priming paint at the factory. 


KOON 


., CHICAGO, ILL. 


1343 So. 55th Court, 


MICA 


FOR HOTELS 


Palmer 
House 
Chicago 


Addition to 
Morrison 


Hotel 
Chicago 


Knapp Carpet 
Strip Anchor 
No. 721 
Used in these 
Hotels 


Addition to 
Hotel 


Sherman 
Chicago 


KNAPP BROTHERS MANUFACTURING CO. 
1343 South 55th Court CELE 


AGO 


10-1-25-5M This Hotel Circular No. 801 and Illustrations Copyright 1925, by Knapp Bros. Mfg. Co. 


Ben Ae eae Bek OCS HIE KSS IV AL NS Unc Ae Crk aS gin wae ClO Zep oN UNEN: 


Knapp Carpet Strip Anchor No. 721 (Patented) 


HE anchors (No. 721) are placed on 

18” centers imbedded solidly in 

the mortar at the time the partitions are 

being built. Double anchors are used 

with partitions and single anchors for 
walls. 


{era NO.43 METAL cove / y, 
( 
Ky 


readers This device eliminates the necessity for 
imbedding nailing strips in cement floors 
or drilling and plugging as has been the 


practice in the past. 


‘foi | 
Acensre caves 5 ° ° ° 

SRB AMSNCANO.72 This anchor is being used in the 
Palmer House, Morrison Hotel, Sherman 
Hotel and several other hotels now being 


planned in Chicago, Illinois. 


Knapp Carpet Strip Anchor No. 721 and No. 43 Cove Ls 


HE design opposite illustrates the adaptation 

of Knapp’s No. 204 Two-Member Base as a 
suitable and practical arrangement in connection 
with a carpet tack strip. The lower member is 
easily removable for taking up and replacing car- 
pets. It is in harmony with the fireproof construc- 
tion plan. The base being metal with a hard 
smooth surface requires fewer coats of paint and is 
more sanitary than a wood base. Below—is a cross 
section showing the detail of construction and in- 
stallation. Further information upon request. 


The photographs (see opposite page) were taken 
from the Palmer House installation. This device is 
so easily and economically installed that contractors 
allow a considerable rebate over the old-fashioned 
way of attaching the carpet strip to the concrete. 


PLASTER 


WEDGE 
: = 


CARPET aM 
is 


Featuring Knapp’s No. 204 Two-Member Base in Connection 
with Carpet Strip Anchor. 


SUGGESTED SPECIFICATION 


The following should be placed in the masonry and carpentry 
respectively. 


Masonry 


This contractor shall build in Knapp Carpet Strip Anchors 
No. 721, 18” on centers at the floor line of all walls where 
carpet strips are required. These anchors will be furnished by 
the contractor for carpentry and will be installed under his 
supervision. 


4 oR6 


\ne 
pp? Carpentry 


Ts vA “aS SY 
me ACK This contractor shall install all carpet strips as required 
AA 2))) ‘StF TRIP x : Poe tae Hee 
“ay: 


ZA op t.. eas ot which shall be securely fastened in place with Knapp Carpet Strip 

12h Sas eee yee ee Sours Anchors No. 721, made by the Knapp Brothers Manufacturing & 

Os . Company, Chicago, Illinois, spaced 18” on centers. This con- 

tractor shall furnish the anchors to the masonry contractors who 

Section: Noi. 204i Divo. Member aBases Wath will build them into all brick and tile walls and partitions and 
Carpet Strip Anchor shall also see that he installs the anchors as required. 


poe Au Le 
RETE to 
LED a ai 2 oO 


KeNGAS ese BART Om se baie. VAIN Ura ASG al Ui Re TaN G G2OyNE EP PAINT ry: 


boston 


Illustrating Carpet Strip Installed Ready for Carpet and Base 


K Neve PB BRO T Hi beRes MAGNA SRSA Coie URI ITINeG CAS Ming Ba IN Ea 


Knapp Carpet Fastener and Base 


(Patented 12-16-24.-. 3-10-25. Other Patents Pending) 


This Cut Illustrates ‘A New Departure’’ 


f | ‘HIS design features a new departure from the old-fashioned carpet wood strip wherever carpets are used 
in fireproof construction. 


The prime features are: A metal channel and lockplates which fasten and hold the carpet in place without 
injury to expensive carpets, and eliminating the use of the wood strip and carpet tacks. The channel is held 
in position by the use of a piece of common wire imbedded under the partition wall or in the outer wall as the 
case may be. The lock-plates are 5 inches long and are easily installed. When it is desired to remove carpet 
for renovating purposes, etc., all that is necessary is to remove the lower member of the base and pull the carpet 
upward by the loose end and all the lock-plates on one side of the room are released simultaneously. 


The two member base may be made of metal or wood, and in either case the top member is installed per- 
manently. The lower member is easily removed and replaced again with screw clamps, and is so designed that no 
corner fittings or end-stops (in the metal base) are required. The corners are formed by merely notching out the 
flange and bending to a right angle, thus forming a seamless angle as shown in illustration. Since the base and 
carpet fastener are combined in this design the cost is quite economical, besides providing a device far superior 
to any method yet devised. 


Complete detailed information and cost data will be furnished upon request. 


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KNAPP STAPLE LINE OF PLASTERERS’ ACCESSORIES 


For Sale by 


All Corner Beads Furnished in 6’-7'-8’-9' 10’ and 12’ Lengths 
Base Grounds, Picture Mould and Base Screed Furnished in 10’ Lengths Only 
All Illustrations Except No. 12 Are About Two-Thirds Actual Size. No. 12 is One-Half Size 


“Hump Corner Bead Clip. 
Shipping weight, 33 lbs. per M. 


No. 100—Corner Bead—26 gauge. 

No. 101-—Corner Bead—24 gauge. 
Shipping weight, No. 100, 170 lbs. per M ft. 
Shipping weight, No. 101, 210 lbs. per M ft. 


No. 604—Bull-Nose Corner Bead—26 gauge. 
3%” Radius Nose. 
Shipping weight, 256 lbs. per M ft. 


S oe 


No. 000—Corner Bead—26 gauge. 
Shipping weight, 185 lbs. per M ft. 


No. 1 Base Crounds—26 gauge 
No. 14% Base Grounds—24 gauce 
Shipping weight, No. 


- For 144”, 54” or %” Ground. 


y/ 


! 
( 
16”, 158 lbs. per M ft. 


No. 15'%—Corner Bead—26 gauge. 


lo ae 
rat ae aes Shipping weight, No. 1, 34”, 185 lbs. per M ft. 
Shipping weight, 208, Ibs. per M ft. Shipping weight, No. 114, 44”, 190 lbs. per M ft. 
Shipping weight, No. 114, 34”, 217 lbs. per M ft. 
Shipping weight, No. 1, 96”, 158 lbs. per M ft. 
lh, 


Shipping weight, No. 5%”, 190 lbs. per M fet. 


No. 5—‘‘Imperial’’ Corner Bead—24 gauge. 
Shipping weight, 271 lbs. per M ft. 


No. 4'4%—'‘Inside’’ Corner Bead—26 gauge. 
Shippine weight, 208 lbs. per M ft. 


No. 23—‘‘Eclipse’’ Concealed Picture Mould—26 gauge. 
Shipping weight, 230 lbs. per M ft. 


No. 49—Curved Point Base Screed—-26 gauge. 


Natural Size 


No. 12—“‘Ideal” Corner Bead—26 gauge. Shipping weight, 175 lbs. per M ft. 
Shipping weight, 330 lbs. per M ft. Clips for attaching, 39 lbs. per M. 


KNAPP BROS. MFG. CO. South 55th Court at 14th Street CHICAGO, ILL. 


J 


<7 
y 


Wm. M. Butterfield, Architect 


Photograph of the Interior of a Class Room in the Franklin St. School at Manchester, New Hampshire. 


app 


SANITARY’ 1343 South 55th Court, Chicago, Ill. 


KNAPP BROS. MFG. CO. 


MARK 


TRADE 


i 


sires 


